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- Title
O<sub>3</sub>-assisted UV-Fenton treatment of refining reverse osmosis water: optimization of process conditions by response surface methodology.
- Authors
Changyu Li; Jiaohui Xia; Peipei Zhu; Lingling Ma; Jincheng Ding; Jie Lu
- Abstract
In this study, the O3-assisted UV-Fenton process was used to treat the reverse osmosis concentrate of refining wastewater. Five factors were investigated in the single factor experiments, and the results showed that the chemical oxygen demand (COD) removal rate could reach 92.0% at the initial pH of 3, H2O2 concentration of 680 mg/L, Fe2+ dosage of 400 mg/L, O3 consumption of 15 mg/L and ultraviolet (UV) fluence of 540 mJ/cm2. Based on the results of single factor experiments, the first four factors (initial pH, H2O2 concentration, Fe2+ dosage and O3 dosage) were selected as the independent variables and optimized by the response surface approach. According to the response surface experiment results, the quadratic model was established. Through the modeling and analysis of variance, the most significant interactive influence was observed between pH and O3 dosage. The maximum COD removal of 93.2% in the verifying test was obtained under the optimum conditions such as the pH of 2.5, H2O2 dosage of 826 mg/L, Fe2+ dosage of 300 mg/L, ozone dosage of 17 mg/L and UV fluence of 540 mJ/cm2.
- Publication
Desalination & Water Treatment, 2017, Vol 66, p133
- ISSN
1944-3994
- Publication type
Article
- DOI
10.5004/dwt.2017.0066